4 ms·
The spreading is ok but the transport is high. The key thing is: how many years of weathering do you get out of one load of 47 tons (or 27t)? The paper provide
by dgacmu 3y ago
The spreading is ok but the transport is high. The key thing is: how many years of weathering do you get out of one load of 47 tons (or 27t)?
The paper provides a very course estimate that what they measured over the year was only 0.15% of total weathering potential, which if we handwave a little turns into 6,000 lbs CO2 over 20 years, or 300 gallons of gas offset, which is probably a net gain. Though there are a ton of "it depends"es in there and it probably only makes sense with further electrification.
(Obviously, the weathering would go on for a lot longer than 20 years, but the unknowns get large there and I'm assuming we're mostly interested in a shorter time frame)
- hedora 3y agoOK, with something something like the F-550 (on the small side for this use case, but also a reasonable choice for an ICE dump truck that's driving to/from agricultural fields), it could work: https://www.ford.com/commercial-trucks/chassis-cab/models/f550-xl/ https://www.ford.com/commercial-trucks/chassis-cab/models/f5... That can move 14,870 lbs (minus the weight of the driver and the dump truck bed) per trip, so it would take more than 6.7 trips to deliver rock to treat an acre. At 6.7 trips per acre it would have to use less than 44 gallons of gasoline per trip for breakeven. It should use significantly less than that for fields that are somewhat close to an appropriate quarry / rockery. The lightning can only move 7000 lbs per trip, so it would have to make 13.5 trips per acre.